adccommunitymod (AutomationDirect) asked a question.
Created Date: June 15,2012
Created By: awander
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I have been tasked with coming up with a way to repair a small custom controller for one of our customers. The controller uses a DL105 to control a DC motor controller, which opens a set of millwork doors that cover a projection screen. Everything in the enclosure seems to work except for the DL105. When 120VAC power is applied, no lights are lit, and there is no response to any of the dry contacts on the inputs. I thought it might be something simple, so I opened up the DL105, and started tracing the power supply circuitry. I discovered that there is a 10 ohm resistor in series with L1 power lead, which was open. I replaced the resistor, but the unit still does not power up-I have done a little bit more circuit tracing, and it appears that : -AC L1 passes through a 10 ohm 2W resistor, then through one winding of the line filter, and to one "AC " terminal on a small bridge rectifier. -AC Neutral is tied to the other winding on the line filter, and passes through that to the second "AC " terminal on the bridge rectifier. I am pretty much resigned to purchasing a new DL105 as well as the programming software, but since my company was not the one who originally built and programmed the controller, I am not sure how it was set up to run-and the customer is no help in this instance. The OPEN and CLOSE functions are activated by momentary closures, and I can't get any info from the customer on whether the motor gets activated for a certain amount of time, or if there is a limit switch that shows when the end of travel has been reached, etc.... I am wondering if i can somehow try to pull the program out of this DL105. I thought of maybe disconnecting the onboard power supply(probably by pulling the regulator off the board) and applying an external 5V DC supply in it's place(all of the chips on the board appear to use a 5V supply). Then, if the program didn't get whacked by whatever took out the power supply, I thought I could save the existing program. Is there any chance of obtaining a schematic diagram of the DL105? Andy
Created Date: June 15,2012
Created by: bcarlton
Facts Engineering , the makers of this unit, may, with an NDA help you. It can't hurt to ask.
Created Date: June 15,2012
Created by: awander
Thanks, I contacted them.
Created Date: June 15,2012
Created by: awander
Facts Engineering will not release schematic, but will attempt repair for $100 max charge.
Not sure if they can save the program.
Created Date: June 22,2012
Created by: kasky
The DL105's were well known for the terminal strips going bad over time. AD did release replacement terminal strips at one point that were made from a different type of material if I'm remembering right.
Anyway you might just try removing the terminal strip and fiddling with the power connections.
Good luck.
Created Date: June 25,2012
Created by: DaveS
My repair on a DL06...
I had some power supplies on some DL06's that went out. As it turned out I overloaded the 24V output. What I found was a bad transorb (looks like a diode) and replaced it. I haven't had a problem since (and learned my lesson).:D
Created Date: June 15,2012
Created by: awander
I have been tasked with coming up with a way to repair a small custom controller for one of our customers. The controller uses a DL105 to control a DC motor controller, which opens a set of millwork doors that cover a projection screen.
Everything in the enclosure seems to work except for the DL105. When 120VAC power is applied, no lights are lit, and there is no response to any of the dry contacts on the inputs.
I thought it might be something simple, so I opened up the DL105, and started tracing the power supply circuitry. I discovered that there is a 10 ohm resistor in series with L1 power lead, which was open. I replaced the resistor, but the unit still does not power up-I have done a little bit more circuit tracing, and it appears that :
-AC L1 passes through a 10 ohm 2W resistor, then through one winding of the line filter, and to one "AC " terminal on a small bridge rectifier.
-AC Neutral is tied to the other winding on the line filter, and passes through that to the second "AC " terminal on the bridge rectifier.
I am pretty much resigned to purchasing a new DL105 as well as the programming software, but since my company was not the one who originally built and programmed the controller, I am not sure how it was set up to run-and the customer is no help in this instance. The OPEN and CLOSE functions are activated by momentary closures, and I can't get any info from the customer on whether the motor gets activated for a certain amount of time, or if there is a limit switch that shows when the end of travel has been reached, etc....
I am wondering if i can somehow try to pull the program out of this DL105. I thought of maybe disconnecting the onboard power supply(probably by pulling the regulator off the board) and applying an external 5V DC supply in it's place(all of the chips on the board appear to use a 5V supply). Then, if the program didn't get whacked by whatever took out the power supply, I thought I could save the existing program.
Is there any chance of obtaining a schematic diagram of the DL105?
Andy